ISL91107IRTAZ Renesas

DATASHEET ISL91107IR FN8687 Rev 0.00 High Efficiency Buck-Boost Regulator with 4.1A Switches March 2, 2015 The ISL91107IR is a highly-integrated buck-boost switching Features regulator that accepts input voltages either above or below the Accepts input voltages above or below regulated output regulated output voltage. Unlike other buck-boost regulators, voltage this regulator automatically transitions between operating modes without significant output disturbance. Automatic and seamless transitions between buck and boost modes This device is capable of delivering up to 2A of output current (PVIN = 2.8V, V = 3.3V) and provides excellent efficiency Input voltage range: 1.8V to 5.5V OUT due to its fully synchronous 4-switch architecture. No-load Output current: up to 2A (PVIN = 2.8V, V = 3.3V) OUT quiescent current of only 45A also optimizes efficiency under High efficiency: up to 96% light load conditions. 45A quiescent current maximizes light load efficiency The ISL91107IR is designed for standalone applications and 2.5MHz switching frequency minimizes external component supports 3.3V fixed output voltages or variable output voltages size with an external resistor divider. Output voltages as low as 1V or as high as 5.2V are supported using an external resistor Selectable forced PWM mode divider. Fully protected for short-circuit, over-temperature and The ISL91107IR requires only a single inductor and very few undervoltage external components. Power supply solution size is minimized Small 3mmx4mm TQFN package by its 2.5MHz switching frequency, allowing small size external components. Applications The ISL91107IR is available in a 3x4 20 Ld TQFN package. Smartphones and tablet PCs Wireless communication devices Optical modules networking equipment 100 V = IN ISL91107IRTNZ 1.8V TO 5.5V 95 PVIN V = 3.6V LX1 IN L 1 C 1 1H 22F 90 V = 3.3V VIN LX2 OUT 85 MODE VOUT V = 2.7V EN IN V = 4.2V 80 IN C 2 V = 3V 2x22F IN FB 75 SGND PGND 70 V = 2.5V IN 65 60 0.001 0.01 0.1 1.0 3.0 LOAD CURRENT (A) FIGURE 1. TYPICAL ISL91107IRTNZ APPLICATION FIGURE 2. EFFICIENCY vs OUTPUT CURRENT (V =3.3V) OUT FN8687 Rev 0.00 Page 1 of 13 March 2, 2015 EFFICIENCY (%)ISL91107IR Block Diagram LX1 LX2 LX1 LX2 PVIN VOUT PVIN VOUT SOFT SOFT DISCHARGE DISCHARGE GATE GATE DRIVERS DRIVERS T E AND ANTI- N S & ANTI- - + E R SHOOT-THRU EN EN R SHOOT THRU E R V EN E U EN ENEN R C EN EN PGND PGND VIN V VIN VREF REF PVPVININ MONITOR MONITOR VOUT VOUT CLAMCLAMPP THERMTHERMALAL SHUTDOWN PWM SHUTDOWN PWM CONTROL CUCURRENTRRENT CONTROL MODEMODE DETECT DETECT ENEN VOVOUTUT EN EN MONITOR MONITOR EN EN FBFB - OSC + OSC ENEN + REFREF - ERROR ERROR AMP AMP VOLVOLTTAGEAGE PROGPROG.. SGSGNNDD FN8687 Rev 0.00 Page 2 of 13 March 2, 2015 REVERSE CURRENT